[CLEAN] [IMP] website_blog: module cleaning + website template improvements

[CLEAN] [IMP] website_blog: module cleaning + website template improvements

[MOV] website_blog: module organization cleaning. Files have been moved accordingly to the new organization
we would like to impose in OpenERP addons :
- model-related files: in models directory
- data/demo files: in data directory
- renamed sexurity/website_mail.xml to website_blog.xml, to avoid confusing the module with website_mail

[CLEAN] website_blog: cleaned website templates

Cleaned options: tags, hide author name, ... and default values for those options. We decided
to display tags, but hide blog name. Default implementation is a single blog layout.

Fixed display without right column: should take all page width.

Updated template ids: option begin by opt_ to easily find them when grepping / searching.

[FIX] website_blog: fixed class name for tests, importing class that does not exist anymore in trunk (was changed)

bzr revid: tde@openerp.com-20131011093913-qlkgqxvodlx41rnk